"Every time I tried to start a conversation with her—well, let's just say she seemed nervous the whole time. She seems to me like a lost little girl, someone who desperate needs guidance," Aguilera said.

Spears retaliated in the same magazine just weeks later, noting: "A lost girl? I think it's probably the other way around. I can't believe she said that about me."

She also relayed a story about Aguilera in which she tried to paint the "Dirrty" singer as two-faced.

"She comes up to me in a club in front of all these people and tries to put her tongue down my throat!" Spears claimed. "I say, 'It's good to see you,' and she goes, 'Well, you're not being real with me.' I was like, 'Well, Christina, what's your definition of real? Going up to girls and kissing them after you haven't seen them for two years?'...When someone has been rude to you so many times, it's like, 'You know what, Christina, I'm really not about the fake anymore.'"